Investigation of the structural and thermal properties of Y, Ag and Ce-assisted SiO2–Na2O–CaO–P2O5-based glasses derived by sol–gel method
Investigation of the structural and thermal properties of Y, Ag and Ce-assisted SiO2–Na2O–CaO–P2O5-based glasses derived by sol–gel method
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DOI：
10.1007/s10973-016-6012-7
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发表时间：
2017-05
影响因子：
4.4
通讯作者：
O. Kaygili;Serhat Keser;C. Tatar;Suleyman Koytepe;Tankut Ateş
中科院分区：
文献类型：
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作者：
O. Kaygili;Serhat Keser;C. Tatar;Suleyman Koytepe;Tankut Ateş
用溶胶-凝胶法在900℃合成了由SiO_2-Na_2O-CaO-P_2O_5组成的玻璃，并在相同的条件下用该碱体系制备了含Y、含银和含Ce的玻璃。用X射线衍射仪、傅里叶变换红外光谱、扫描电子显微镜、能量色散X射线能谱和差热分析技术对玻璃样品的结构和热性能进行了研究。每个样品都有Ca5(PO4)2(SiO4)6相，其晶系为正交晶系，没有任何第二相，FTIR谱图证实了这一点。在SiO_2-Na_2O-CaO-P_2O_5系统中加入Y、Ag、Ce后，观察到平均微晶尺寸、结晶度、晶格参数和晶胞体积的变化。随着Y、Ag和Ce的加入，晶化峰温度降低，玻璃化转变温度发生变化。Y、Ag、Ce的加入显著提高了基玻璃的密度。所制备样品的EDX谱证实了上述元素的引入。
A glass with the composition of the SiO2–Na2O–CaO–P2O5was synthesized by sol–gel method at temperature of 900 °C, and then yttrium-, silver- and cerium-containing glasses were prepared at the same conditions using this base system. The structural and thermal properties of the glass samples were investigated by X-ray diffraction, Fourier transform infrared (FTIR) spectroscopy, scanning electron microscopy, energy-dispersive X-ray (EDX) spectroscopy and differential thermal analysis techniques. The Ca5(PO4)2(SiO4)6phase having the orthorhombic crystal system is detected for each sample without any secondary phase, and this phase is confirmed by the FTIR spectra. With the addition of Y, Ag and Ce to the SiO2–Na2O–CaO–P2O5system, the variations in the average crystallite size, crystallinity percent, lattice parameters and unit cell volume are observed. A decrease in the crystallization peak temperature and the changes in the glass transition temperature are seen with the addition of Y, Ag and Ce to the base system. The addition of Y, Ag and Ce to the base glass increases significantly its density. The EDX spectra of the as-prepared samples verify the introduction of the as-mentioned elements.